Structure of 13Be probed via quasi-free scattering

Corsi, A.; Kubota, Yuki; Casal, J.; Gómez-Ramos, M.; Moro, A. M.; Authelet, G.; Baba, H.; Caesar, C.; Calvet, D.; Delbart, A.; Dozono, M.; Feng, Jinhui; Flavigny, F.; Gheller, J.-M.; Gibelin, J.; Giganon, A.; Gillibert, A.; Hasegawa, K.; Isobe, T.; Kanaya, Yoshio; Kawakami, Satoshi; Kim, D.; Kiyokawa, Yasushi; Kobayashi, Mariko; Kobayashi, N.; Kobayashi, T.; Kondo, Y.; Korkulu, Z.; Koyama, S.; Lapoux, V.; Maeda, Y.; Marqués, F. M.; Motobayashi, T.; Miyazaki, Takamichi; Nakamura, Takashi; Nakatsuka, N.; Nishio, Y.; Obertelli, A.; Ohkura, A.; Orr, N. A.; Ota, S.; Otsu, H.; Ozaki, T.; Panin, V.; Paschalis, S.; Pollacco, E. C.; Reichert, S.; Roussé, J.-Y.; Saito, A.; Sakaguchi, Satoshi; Šako, M.; Santamaria, C.; Sasano, M.; Sato, Hiromi; Shikata, M.; Shimizu, Y.; Shindo, Y.; Stuhl, L.; Sumikama, T.; Sun, Y.; Tabata, M.; Togano, Y.; Tsubota, J.; Uesaka, T.; Yang, Z.; Yasuda, J.; Yoneda, K.; Zenihiro, J.

doi:10.1016/j.physletb.2019.134843

Cited by 18 publications

(43 citation statements)

References 56 publications

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“…It is apparent that the so-called dineutron configuration, i.e., the peak corresponding to twoneutrons close to each other at some distance from the core, is dominant and more localized for sets B and C. The dineutron maxima in these models accumulate about twice as much probability as the opposite "cigar"-like peak, in contrast to sets A and D in which this ratio is closer to unity. This is a consequence of a larger mixing between different-parity states when using sets B and C [49], and resembles the case of the two-neutron halo nuclei 11 Li [50] or 14 Be [51]. With the adopted S 2n value, however, the spatial extension of the wave function is not as large, with respect to the core, as expected for a typical halo nucleus.…”

Section: Three-body ( 27 F + N + N) Calculationsmentioning

confidence: 76%

Exploring two-neutron halo formation in the ground state of F29 within a three-body model

et al. 2020

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Background: The 29 F system is located at the lower-N boundary of the "island of inversion" and is an exotic, weakly bound system. Little is known about this system beyond its two-neutron separation energy (S2n) with large uncertainties. A similar situation is found for the low-lying spectrum of its unbound binary subsystem 28 F.Purpose: To investigate the configuration mixing, matter radius and neutron-neutron correlations in the groundstate of 29 F within a three-body model, exploring the possibility of 29 F to be a two-neutron halo nucleus. Method:The 29 F ground-state wave function is built within the hyperspherical formalism by using an analytical transformed harmonic oscillator basis. The Gogny-Pires-Tourreil (GPT) nn interaction with central, spin-orbit and tensor terms is employed in the present calculations, together with different core + n potentials constrained by the available experimental information on 28 F. Results:The 29 F ground-state configuration mixing and its matter radius are computed for different choices of the 28 F structure and S2n value. The admixture of d-waves with pf components are found to play an important role, favouring the dominance of dineutron configurations in the wave function. Our computed radii show a mild sensitivity to the 27 F + n potential and S2n values. The relative increase of the matter radius with respect to the 27 F core lies in the range 0.1 -0.4 fm depending upon these choices.Conclusions: Our three-body results for 29 F indicate the presence of a moderate halo structure in its ground state, which is enhanced by larger intruder components. This finding calls for an experimental confirmation.

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Section: Three-body ( 27 F + N + N) Calculationsmentioning

confidence: 76%

Exploring two-neutron halo formation in the ground state of F29 within a three-body model

et al. 2020

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“…The results are given in figure 7 (solid blue curve) as a function of the scattering length a S . 19 B appears to be bound in all the range of the experimentally allowed a s values, starting from a s ⇡ -30 fm. The binding energy increases with | a s | and saturates at E u = 0.081 MeV in the limit a S !…”

Section: Describing 19 B As a 17 B-n-n Three-body Clustermentioning

confidence: 95%

“…In some cases, where incompatible results are assigned to the same reaction, like for instance for the n-3 H, we have chosen the "Recommended value" or our personal conclusion guided by some theoretical input (see [6,15,16] for a discussion). In other cases, the quoted value results from a theoretical analysis of experimental data [19,20].…”

Section: N-a Scattering Lengthmentioning

confidence: 99%

“…As a consequence the effects due to antisymmetrization with the S-wave incoming n is weakened and the balance between the attractive nN interaction and the Pauli repulsion results in favour of an attractive S-wave state. This attraction persists in 12 Be [19] and 15 B [20].…”

Section: N-a Scattering Lengthmentioning

confidence: 99%

“…In order to describe 19 B as a 17 B-n-n cluster, potential (1) has been supplemented with a realistic n-n interaction. The three body problem was then solved using both Faddeev equations 0,00 0,01 0,02 0,03 0,04 0,05 0,06 0,07 0,08 0,09 0,10 in configuration space [9] and Gaussian Expansion method [29] to inquire for the energy of the 19 B ground state provided by this three-body model.…”

Section: Describing 19 B As a 17 B-n-n Three-body Clustermentioning

confidence: 99%

See 2 more Smart Citations

Low-energy neutron scattering on light nuclei and $^{19}$B as a $^{17}$B-$n$-$n$ three-body system in the unitary limit

Carbonell

Hiyama

Lazauskas

et al. 2020

SciPost Phys. Proc.

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We consider the evolution of the neutron-nucleus scattering length for the lightest nuclei. We show that, when increasing the number of neutrons in the target nucleus, the strong Pauli repulsion is weakened and the balance with the attractive nucleon-nucleon interaction results into a resonant virtual state in 18 B. We describe 19 B in terms of a 17 B-n-n three-body system where the two-body subsystems 17 B-n and n-n are unbound (virtual) states close to the unitary limit. The energy of 19 B ground state is well reproduced and two low-lying resonances are predicted. Their eventual link with the Efimov physics is discussed. This model can be extended to describe the recently discovered resonant states in 20,21 B.

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Research on the influence of quadrupole deformation and continuum effects on the exotic properties of $$^{15,17,19}$$B with the complex momentum representation method

Cao

Zhou

et al. 2023

NUCL SCI TECH

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Structure of 13Be probed via quasi-free scattering

Cited by 18 publications

References 56 publications

Exploring two-neutron halo formation in the ground state of F29 within a three-body model

Exploring two-neutron halo formation in the ground state of F29 within a three-body model

Low-energy neutron scattering on light nuclei and $^{19}$B as a $^{17}$B-$n$-$n$ three-body system in the unitary limit

Research on the influence of quadrupole deformation and continuum effects on the exotic properties of $$^{15,17,19}$$B with the complex momentum representation method

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